A mature strand of human hair divided into two principal parts known as the ___________.

What is the structure in the skin or scalp encases a hair root?

What is the lowest part of the hair strand?

What structure is described as a small, cone -shaped elevation located at the bottom of the hair follicle?

What small involuntary muscle is attached to the underside of a hair follicle?

Oil glands of the skin, connected to the hair follicles, are known as _______________

Of the 20 amino acids that make up hair, a person must obtain ___________ of the essential amini acids from the daily diet.

The three main layers of the hair shaft are the ________________

What is the substance in the cortex gives natural color to the hair?

As the newly formed cells mature, they fill-up with a fibrous _______________, then move upward, lose their nucleus, and die. This process is called keratinization.

Normal hair contains _____________ percent of the element carbon.

Normal hair contains ______________ percent of the element oxygen.

In the makeup of normal human hair, what COHNS element is present in the lowest percentage?